99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
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/*
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* ParamEq.h
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* ---------
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* Purpose: Implementation of the DMO Parametric Equalizer DSP (for non-Windows platforms)
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* Notes : (currently none)
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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#ifndef NO_PLUGINS
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#include "../PlugInterface.h"
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OPENMPT_NAMESPACE_BEGIN
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namespace DMO
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{
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class ParamEq final : public IMixPlugin
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{
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protected:
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enum Parameters
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{
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kEqCenter = 0,
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kEqBandwidth,
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kEqGain,
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kEqNumParameters
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};
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std::array<float, kEqNumParameters> m_param;
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// Equalizer coefficients
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float b0DIVa0, b1DIVa0, b2DIVa0, a1DIVa0, a2DIVa0;
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// Equalizer memory
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float x1[2], x2[2];
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float y1[2], y2[2];
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float m_maxFreqParam;
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public:
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static IMixPlugin* Create(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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ParamEq(VSTPluginLib &factory, CSoundFile &sndFile, SNDMIXPLUGIN *mixStruct);
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void Release() override { delete this; }
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int32 GetUID() const override { return 0x120CED89; }
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int32 GetVersion() const override { return 0; }
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void Idle() override { }
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uint32 GetLatency() const override { return 0; }
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void Process(float *pOutL, float *pOutR, uint32 numFrames) override;
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float RenderSilence(uint32) override { return 0.0f; }
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int32 GetNumPrograms() const override { return 0; }
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int32 GetCurrentProgram() override { return 0; }
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void SetCurrentProgram(int32) override { }
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PlugParamIndex GetNumParameters() const override { return kEqNumParameters; }
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PlugParamValue GetParameter(PlugParamIndex index) override;
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void SetParameter(PlugParamIndex index, PlugParamValue value) override;
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void Resume() override;
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void Suspend() override { m_isResumed = false; }
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void PositionChanged() override;
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bool IsInstrument() const override { return false; }
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bool CanRecieveMidiEvents() override { return false; }
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bool ShouldProcessSilence() override { return true; }
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#ifdef MODPLUG_TRACKER
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CString GetDefaultEffectName() override { return _T("ParamEq"); }
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CString GetParamName(PlugParamIndex param) override;
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CString GetParamLabel(PlugParamIndex) override;
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CString GetParamDisplay(PlugParamIndex param) override;
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CString GetCurrentProgramName() override { return CString(); }
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void SetCurrentProgramName(const CString &) override { }
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CString GetProgramName(int32) override { return CString(); }
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bool HasEditor() const override { return false; }
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#endif
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int GetNumInputChannels() const override { return 2; }
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int GetNumOutputChannels() const override { return 2; }
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protected:
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float BandwidthInSemitones() const { return 1.0f + m_param[kEqBandwidth] * 35.0f; }
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float FreqInHertz() const { return 80.0f + m_param[kEqCenter] * 15920.0f; }
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float GainInDecibel() const { return (m_param[kEqGain] - 0.5f) * 30.0f; }
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void RecalculateEqParams();
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};
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} // namespace DMO
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OPENMPT_NAMESPACE_END
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#endif // !NO_PLUGINS
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